Cabaletta Bio, Inc. — Director's Dealing 2025

Oct 15, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Cabaletta Bio, Inc. (CABA)
CIK: 0001759138
Period of Report: 2025-10-13

Reporting Person: Gavel Steve (N/A)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-10-13	Stock Option (Right to Buy)	$2.49	A	275000	Acquired	2035-10-12	Common Stock (275000)	Direct

Footnotes

F1: The stock option has been granted pursuant to the Cabaletta Bio, Inc. 2025 Inducement Plan as a material inducement to the Reporting Person's acceptance of employment with the Issuer in accordance with NASDAQ Listing Rule 5635(c)(4).

F2: 25% of the shares underlying this option shall vest and become exercisable on October 13, 2026, with the remainder vesting in twelve substantially equal quarterly installments thereafter, subject to the Reporting Person's continued service on each such vesting date.